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Aluminium Arsenite, AlNaO3

Aluminium Arsenite, AlNaO3, has been obtained by the addition of barium arsenite or potassium tetrarsenite, K2As4O7.2H2O, to an aqueous solution of aluminium sulphate. In the former case, after filtration and concentration over sulphuric acid, rhombic pyramids were obtained. The second method yielded a gelatinous precipitate which after drying left a white powder. The arsenite decomposes on heating, alumina and arsenious oxide being the sole products; it is slightly soluble in boiling water, readily soluble in acids and in aqueous sodium hydroxide.

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